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47 of 69 (68%) achievements earned:
Personal Achievements
 

Defiant

Hit the trashcan cop with the can.
Unlocked 13 Oct @ 12:37am

Submissive

Put the can in the trash.
Unlocked 30 Sep @ 9:19am

Malcontent

Escape the apartment block raid.
Unlocked 30 Apr @ 5:29am

What cat?

Break the mini-teleporter in Kleiner's lab.
Unlocked 13 Oct @ 12:46am

Trusty Hardware

Get the crowbar.
Unlocked 30 Sep @ 9:32am

Barnacle Bowling

Kill five barnacles with one barrel.
Unlocked 13 Oct @ 1:07am

Anchor's Aweigh!

Get the airboat.
Unlocked 27 Sep, 2023 @ 3:27am

Heavy Weapons

Get the airboat's mounted gun.
Unlocked 5 Oct @ 7:24am

Vorticough

Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Unlocked 13 Oct @ 2:26am

Revenge!

Destroy the hunter-chopper in Half-Life 2.
Unlocked 5 Oct @ 8:10am

Blast from the Past

Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked 13 Oct @ 2:57am

Zero-Point Energy

Get the Gravity Gun in Black Mesa East.
Unlocked 5 Oct @ 8:21am

Two Points

Use DOG's ball to make a basket in Eli's scrapyard.
Unlocked 13 Oct @ 3:06am

Zombie Chopper

Play through Ravenholm using only the Gravity Gun.
Unlocked 13 Oct @ 3:38am

Hallowed Ground

Escort Gregori safely through the church cemetery.
Unlocked 5 Oct @ 9:14am

OSHA Violation

Kill 3 enemies using the crane.
Unlocked 5 Oct @ 9:57am

Targetted Advertising

Pin a soldier to the billboard in chapter Highway 17.
Unlocked 13 Oct @ 4:24am

Where Cubbage Fears to Tread

Defend Little Odessa from the gunship attack.
Unlocked 5 Oct @ 9:49am

One Man Army

Destroy six gunships in Half-Life 2.
Unlocked 6 Oct @ 4:56am

Keep Off the Sand!

Cross the antlion beach in chapter Sandtraps without touching the sand.
Unlocked 13 Oct @ 7:21am

Bug Hunt

Use the antlions to kill 50 enemies.
Unlocked 6 Oct @ 5:16am

Flushed

Kill an enemy with a toilet.
Unlocked 13 Oct @ 8:02am

Warden Freeman

Survive the second turret standoff in Nova Prospekt.
Unlocked 7 Oct @ 9:49am

Follow Freeman

Gain command of a squad of rebels in the uprising.
Unlocked 7 Oct @ 10:07am

Radiation Levels Detected

Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked 7 Oct @ 10:35am

Plaza Defender

Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked 7 Oct @ 11:16am

Counter-Sniper

Kill all of the snipers in City 17.
Unlocked 13 Oct @ 11:04am

Fight the Power

Shut down the supression device by disabling its generators.
Unlocked 8 Oct @ 10:30am

Giant Killer

Survive the rooftop strider battle in the ruins of City 17.
Unlocked 10 Oct @ 9:45am

Atomizer

Disintegrate 15 soldiers by throwing them into a Combine ball field.
Unlocked 14 Oct @ 12:14am

Singularity Collapse

Destroy the Citadel's reactor core.
Unlocked 22 Apr, 2023 @ 10:34am

Lambda Locator

Find all lambda caches in Half-Life 2.
Unlocked 13 Oct @ 10:52am

Hack Attack!

Kill five enemies with a Manhack.
Unlocked 10 Oct @ 10:01am

Watch Your Head!

Make it to the bottom of the Citadel's main elevator shaft in one piece.
Unlocked 16 Nov @ 12:43am

Containment

Contain the Citadel core.
Unlocked 16 Nov @ 12:43am

Pacifist

Contain the Citadel core without killing any stalkers.
Unlocked 16 Nov @ 12:43am

Car Crusher

Use the cars to squash 15 antlions in Episode One.
Unlocked 16 Nov @ 12:43am

Elevator Action

Survive long enough to get on the parking garage elevator.
Unlocked 16 Nov @ 12:43am

Live Bait

Help Alyx snipe 30 enemies in Episode One.
Unlocked 16 Nov @ 12:43am

Attica!

Destroy the gunship in the hospital attic.
Unlocked 16 Nov @ 12:43am

Citizen Escort

Don't let any citizens die when escorting them to the escape train.
Unlocked 16 Nov @ 12:43am

Escape From City 17

Escape City 17 with Alyx.
Unlocked 16 Nov @ 12:43am

The One Free Bullet

Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Unlocked 16 Nov @ 12:43am

Conservationist

Kill five enemies with the same energy ball.
Unlocked 16 Nov @ 12:43am

Think Fast!

Kill an Elite Soldier with his own energy ball.
Unlocked 16 Nov @ 12:43am

Zombie-que

Use flares to light 15 zombies on fire.
Unlocked 16 Nov @ 12:43am

Gnome Alone

If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
Unlocked 16 Nov @ 12:51am



Acid Reflex

Kill an acid antlion worker.

Get Some Grub

Squish every antlion grub in Episode Two.

Piñata Party

Find and break every web cache in Episode Two.

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

Twofer

Defeat both antlion guards outside the White Forest.

Hit and Run

Run over 20 enemies with the car in Episode Two.

Meet the Hunters

Survive the Hunter ambush with Alyx.

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

Gunishment!

Destroy the Combine Autogun in the junkyard.

Cache Checker

Find every radar cache in chapter Under The Radar.

Pedal to the Metal

Beat DOG in a race to the White Forest base.

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.

Little Rocket Man

Send the garden gnome into space.

Secondary Silo Secured

Secure the launch doors on missile silo 2.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Defense of the Armament

Save the missile silo from the Combine offensive.

Payback

Kill a Hunter with its own flechettes.

Bone Breaker

Kill 30 enemies with thrown physics objects.

Deadly Harvest

Kill an enemy by planting a hopper mine.

Hot Potat0wned

Kill a Combine soldier with his own grenade.

Grave Robber

Steal a Zombine's grenade.